class_docstr: Mesh implemented using explicit device placement.
code: def devices(self):
      return self._devices
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import functools
  import os
  import random
  from mesh_tensorflow import ops_with_redefined_builtins
  from six.moves import xrange
  import tensorflow.compat.v1
label_desc: Use image node_id 11 for calling the PlacementMeshImpl obj's underlying member method code with example usage: obj.devices() and returns: self